Cutter chain



April 26,1927. 1,626,016 F. W. VODOZ CUTTER CHAIN mea D66. 24. 1924 asheets-Sneet 1 Il l llyiless u www? Patented Apr. 276, 1927.

UNITED s'1u4..'rr:sI

FREDERICK w. venez, or wILnETTn, ILLINoIs, AssIGNon To eoomlANV MANUFAC- TUBING COMPANY, or CHICAGO, ILLINOIS, A ConroaATIoN or ILnmoIs-- CUTTER CHAIN.

Application led December 24, 1.924. Serial No. 757,896.

This invention relates to improvements in cutter chains for kerf cutting mining ma-- chines, and mre particularly to cutter blocks, and has lfor its principal object ,to produce a new and improved block wherein a simple and elncient form of set screw is used for securing the bit in place, the bit projecting from the front face of the cutter block but means are provided for protecting e-projeoting portion of the set 'screw from abrasion. which means also serve yto lpropel the cuttings and clear thenrfrom the er Y Heretofore in'any forms of cutter blocks have been devised having more or less com plicated clamping devices for the purpose of securing the cutter bit inplace. It has been demonstrated that a cutter bit is likely to work loose during the cutting operation. One of 'the simplest and most'eficient means for clamping heretofore used consists of a set screw extending throughl the front of the block and engaging the cutter bit to forceit rearwardly against a relatively at bearing surface formed by the rear wall of a bit receiving aperture. One obection to this general form of block however,^is the fact that `thehead of the 'set screw, lwhich projects through. the front face of the block, is in the path of the cuttings and therefore is subject to considerable wear and abrasion, which often destroys the shape of the set screw head, so as to render it useless. A further objection to this arrangement is due to the fact that the projecting set screw acts as a wedge to part the cuttings to either side of the block, thus permitting the blockto cut through the cuttings instead of carrying them alon with the cutter chain, asis most gesifrable 1n clearing the cuttings fromthe In my present invention I provide a cutter block` utilizing the general and well known form of set screw above described but in conjunction therewith I provide'` a ses ries of plates or propellers carried by the chain so aste be ejected blocks which protect f the set screw head from abrasion and furthermore provide in effect a bearing surface suitable for clearing the cuttings and carryin them with the m the kerf. j' My invention may best be understood by reference to the. wherein? Figure 1 je a sidefvew o f (cutter bleek be understoo body accompanying drawings p and e'a pair of connecting straps constructed in accordance with my invention' Figure 2 is a sectional view talien on line 2-2 of Figure 1; ,I

Figure 3 is a sectionalview taken on line 3-3 of Figure 1; j

Figure 4 isa side view of a portion of cutter arm with a `cutter chain including several cutter vblocks and bits extending at various angles suitable for cutting the 'proper width of kerf; and

Figures 5 to 11, both inclusive, are front views of a series of blocksextending in various positions as shown in Figure 4. Referring now to the details of the cutter chain and blocks shown in the drawings, n

Figure 1 is a view of a center@ block 10 in which the cutter bit extends from the center of the block in substantially the same plane as the central lane ofthe cutter bar. It will d) that the cutter chain of this character works in a groove formed in any suitable manner about the cutter bar` A, being retained therein by means of lips 11. 11, formed along the base of the cutter block and on opposite sides thereof, and similar lips 12, 12, formed on op osite sides of the straps 13, 13. The bloc 10 has a lower portion or base 15 restricted to fit wlthe cutter arm groove and an outer body int portion- 16 `adapted to extend beyond the roove. A pair of holes 17, 17, are provided or connections with the stra s 13, 13, in the usual manner. The bit 20 ts in an aperture 21 which in the form, shown is inclin d forwardly in the block and extends do nwardly between lthe holes 17, 17. The bit maybe of any suitable design, as -for inl stance, it may comprise a dat iece which may be of bar stock tool steel s arpened at both ends, so that either end may be used as desired. The bit is secured in lace'by at set screw 25 threaded through a the front end of the .body p ortion 16 and preferably substantially at right angles to the bit receiving aperture. The head 27 of the set screw projects somewhat beyond the boss 26, in the usual manner. In the position shown it will be noted 'that the .set

"screw engages the bit, to force it firmly ss 26 at.l

against the rear face 29 of the bit-receivingv arture, thus securing the bit firmly in I further provide web sha projections 30 and 31` on opposite sidesc the set screw.

- engagement with the head of the yset screw.

Variations in the size and position of the lateral projections are desirable, depending upon the angle of incidence of the cutj ter bit and bit holder to the cutter bar,

as illustrated in various forms shown in detail in Figures 5, 6 and 7, and 9, 10 and 11. For instance in the form shown in Figure 7, in which the bit and holdin" portion 16 are inclined slightly to the leit, the right hand projection 30L is in substantial longitudinal alignment with the similar projection onA the center block shown in Fi ures 1 to 3, and Figure 8. The left han projection 31a however is not as high as the corresponding left hand projection 31 in the center block. The arrangement is such that the top end of the Y to form a substantial barrier to the pas left hand projection in connection with the top of the right hand projection is suelent sage o f cuttings and also protects the head of. the set screw from abrasion. Figure 9 is the same form` of block as in Figure 7 but'with the cutter bit and block body inclined to the right instead of to the left.

Figures 6 and 10 are similar to the forms .A

shown in Figures, 7 and 9 but with the bits inclined somewhat more from the perpendicular. Figures 5 and 11l show the extreme positions of the cutter bit and block. In these positions it will1be observed that the web on the extreme side ofthe block nearest the cutter bit is omitted, so as Vto permit theuse of a socket wrench for adjusting the set screw. In thiscase however the projections at one side ofI the block body portion 16 form a sufficient web between the projection and the-bossl to propel the cuttings and protect the set screw..

It will be understood that my inventlon may lbe applied to a chain comprising any desired number of bit positions differing from the seven ositions on the chain illustrated herewit While I have shown and described one embodiment of my invention, it will be understood that the arrangement and construction of the. various parts may, be altered without-departing from the spirit and scope ofthe invention. Furthermore, I do not "wish to be construed 'as limiting'myself to the particular construction illustrated excepting as may'be specifically limited in the appended claims. l

I claim as my invention: Y

1. A cutter chain block having a body provided with an outwardly extending bit receiving aperture, a set screw extending through the front face of said block for securing a bit in said aperture, the head of said set screw normally 'projecting beyond the front face of said block, and cuttings propelling means carried by said block and extending laterally therefrom thence forwardly to form a protection for the head of said set screw.

2. A cutter chain block having a' body provided with an outwardly extending bit receiving aperture, a set screw extending through the front face of said block for securing a bit in said aperture, the head of said set screw normally projectin beyond the front face of said block,.an tinge propelling formation formed integrally jwith said block and extending laterally therefrom adjacent said aperture thence forwardly with-a marginal, fiange portion to form a protection for the head of said set screw. v

3. A cutter chain block having a body provided with an upwardly extending boss having a correspondingly extending bit aperture therein, a set screw extending a cutthrough the fronty face of said boss for securing a bit in' said aperture, the head of said screw normally projecting beyond the front face of said block, and a cuttings propellin formation formed integrally with said lock and extending laterally from said boss and thence forwardly with "a side and bottomvmarginal fiange portion to form a protection `for the head of said set screw.

4. A cutter chain block having a body provided with an outwardly extending bit'receiving aperture inclined laterally from the perpendicular plane of the block, a set screw extending through the front face of said block for securing a bit in aper` ture, the head of said set screw normally projecting beyond the front. face of said block, and cuttings propelling means car- ,ried by said block and extending laterally therefrom on both sides of the same and thence forwardly to form a protection for the head of said set screw, the portion of said cuttings propelling means on, the side of saidl block in the direction of which saidv aperture inclines being lower than the other portion thereof. n

5, A cutter chain block having a body provided with an upwardly extendin boss inclined vlaterallt from the perpendicular plane of the bloc and having a correspondlngly extending bit aperture therein, a ,set screw extending through the front face of tending laterally from said/ boss on' both sides thereof and thence forwardly with a side and bottom marginal Han e portion to form a protection for the hea of said set screw, the portion of sa'id cuttings ropellmg formation `on the side of said oss in.

the direction of which the boss inclines` being lower than the other portion thereof.v

Signed at Chicago, in the county of C ook and State of Illinois, this 20th day of--De'- cember, A. D.

FREDERICK W. VODOZ.

ein. 

